This paper describes how the non-contact, nondestructive, remote sensing techniques, of Computer Enhanced Infrared Thermography and Ground Penetrating Radar, may be used to detect buried waste sites, buried tanks/pits, and tank/pit leak plumes. This technology may be used from mobile vehicles, helicopters or man-portable systems and is able to cover tens of acres per day depending upon the system method used. This proven, but relatively new technology, will be described in theory, by procedure and the use of case studies based upon successful projects during the last ten years.